The story of a middle-aged man who surrenders his life to Mistress Cali, a woman he meets on the internet, but barely knows, and becomes her slave #4. He dreams of being her collared slave, living happily-ever-after in Martinsburg, West Virginia. But Cali has three other slaves who have served Mistress Cali for many years, and thus he becomes her #4 slave – the low man on the totem pole. He lives, shackled, in a stall in the barn behind the mansion. His body hair is burned away, he's tattooed as a "slave", his cock and nipples pierced – and that's just in his first week of training. He serves at the pleasure of Mistress Cali at her infamous and lavish dungeon parties where he becomes a pony play. No-holds-barred BDSM.